Numerical Analysis of CNC Milling Chatter Using Embedded Miniature MEMS Microphone Array System
With the increasingly common use of industrial automation for mass production, there are many computer numerical control (CNC) machine tools that require the collection of data from intelligent sensors in order to analyze their processing quality. In general, for high speed rotating machines, an acc...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-01-01
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| Series: | Inventions |
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| Online Access: | http://www.mdpi.com/2411-5134/3/1/5 |
| _version_ | 1819081548830343168 |
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| author | Pang-Li Wang Yu-Ting Tsai |
| author_facet | Pang-Li Wang Yu-Ting Tsai |
| author_sort | Pang-Li Wang |
| collection | DOAJ |
| description | With the increasingly common use of industrial automation for mass production, there are many computer numerical control (CNC) machine tools that require the collection of data from intelligent sensors in order to analyze their processing quality. In general, for high speed rotating machines, an accelerometer can be attached on the spindle to collect the data from the detected vibration of the CNC. However, due to their cost, accelerometers have not been widely adopted for use with typical CNC machine tools. This study sought to develop an embedded miniature MEMS microphone array system (Radius 5.25 cm, 8 channels) to discover the vibration source of the CNC from spatial phase array processing. The proposed method utilizes voice activity detection (VAD) to distinguish between the presence and absence of abnormal noise in the pre-stage, and utilizes the traditional direction of arrival method (DOA) via multiple signal classification (MUSIC) to isolate the spatial orientation of the noise source in post-processing. In the numerical simulation, the non-interfering noise source location is calibrated in the anechoic chamber, and is tested with real milling processing in the milling machine. As this results in a high background noise level, the vibration sound source is more accurate in the presented energy gradation graphs as compared to the traditional MUSIC method. |
| first_indexed | 2024-12-21T20:02:32Z |
| format | Article |
| id | doaj.art-72706041a52d4e45bec08447dff92a28 |
| institution | Directory Open Access Journal |
| issn | 2411-5134 |
| language | English |
| last_indexed | 2024-12-21T20:02:32Z |
| publishDate | 2018-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Inventions |
| spelling | doaj.art-72706041a52d4e45bec08447dff92a282022-12-21T18:51:57ZengMDPI AGInventions2411-51342018-01-0131510.3390/inventions3010005inventions3010005Numerical Analysis of CNC Milling Chatter Using Embedded Miniature MEMS Microphone Array SystemPang-Li Wang0Yu-Ting Tsai1Master’s Program of Electro-Acoustics, Feng Chia University, Taichung 40724, TaiwanBachelor’s Program in Precision System Design, Feng Chia University, Taichung 40724, TaiwanWith the increasingly common use of industrial automation for mass production, there are many computer numerical control (CNC) machine tools that require the collection of data from intelligent sensors in order to analyze their processing quality. In general, for high speed rotating machines, an accelerometer can be attached on the spindle to collect the data from the detected vibration of the CNC. However, due to their cost, accelerometers have not been widely adopted for use with typical CNC machine tools. This study sought to develop an embedded miniature MEMS microphone array system (Radius 5.25 cm, 8 channels) to discover the vibration source of the CNC from spatial phase array processing. The proposed method utilizes voice activity detection (VAD) to distinguish between the presence and absence of abnormal noise in the pre-stage, and utilizes the traditional direction of arrival method (DOA) via multiple signal classification (MUSIC) to isolate the spatial orientation of the noise source in post-processing. In the numerical simulation, the non-interfering noise source location is calibrated in the anechoic chamber, and is tested with real milling processing in the milling machine. As this results in a high background noise level, the vibration sound source is more accurate in the presented energy gradation graphs as compared to the traditional MUSIC method.http://www.mdpi.com/2411-5134/3/1/5beamformingdirection of arrivalvoice activity detectionchatter detection |
| spellingShingle | Pang-Li Wang Yu-Ting Tsai Numerical Analysis of CNC Milling Chatter Using Embedded Miniature MEMS Microphone Array System Inventions beamforming direction of arrival voice activity detection chatter detection |
| title | Numerical Analysis of CNC Milling Chatter Using Embedded Miniature MEMS Microphone Array System |
| title_full | Numerical Analysis of CNC Milling Chatter Using Embedded Miniature MEMS Microphone Array System |
| title_fullStr | Numerical Analysis of CNC Milling Chatter Using Embedded Miniature MEMS Microphone Array System |
| title_full_unstemmed | Numerical Analysis of CNC Milling Chatter Using Embedded Miniature MEMS Microphone Array System |
| title_short | Numerical Analysis of CNC Milling Chatter Using Embedded Miniature MEMS Microphone Array System |
| title_sort | numerical analysis of cnc milling chatter using embedded miniature mems microphone array system |
| topic | beamforming direction of arrival voice activity detection chatter detection |
| url | http://www.mdpi.com/2411-5134/3/1/5 |
| work_keys_str_mv | AT pangliwang numericalanalysisofcncmillingchatterusingembeddedminiaturememsmicrophonearraysystem AT yutingtsai numericalanalysisofcncmillingchatterusingembeddedminiaturememsmicrophonearraysystem |